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Old 04-13-2014, 03:27 AM   #121
dmaxweb
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Sep 2006
Williamsburg, VA
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Quote:
Originally Posted by BcuzIminUT View Post
PIN LOCK POST O-RING SOLVED!!!

Okay, sorry for the yelling above, but I wanted to get your attention. After I switched my gas lines to reinforced lines and beer lines to 3/16” BevSeal (no more beer tasting like water from a garden hose), I developed frequent gas leaks and occasional beer leaks. The reinforced gas lines and BevSeal are much stiffer than the beer/gas lines most use, which caused the fitting to torque and twist. After losing several tanks of CO2, reading this entire post several times and many other posts, I decided to take a hit for the team. Here is what tried:

No. 1. -112 BUNA
No. 2. -112 Silicone
No. 3. 10mm (ID) X 16mm (OD) X 3mm (Diameter) Silicone
No. 4. 12mm (ID) X 17mm (OD) X 2.5mm (Diameter) Silicone
No. 5. 12mm (ID) X 18mm (OD) X 3mm (Diameter) Silicone
No. 6. 10mm (ID) X 17mm (OD) X 3.5mm (Diameter) Silicone

I decided to go with 10mm (ID) X 16mm (OD) X 3mm (Diameter) Silicone for the beer post and 12mm (ID) X 18mm (OD) X 3mm (Diameter) Silicone for the gas post. The inside diameter of Nos. 1 & 2 were too big. The 2.5mm diameter of No. 4 was too small for the groove, and I did not get a snug connection. The 3.5mm diameter of No. 6 was just too thick to fit in the groove.

No. 3 works well on the beer post; it takes a little stretching, but is nice and snug. No. 5 on the gas post is downright tight and takes a little wiggling to get it off. It may be too tight for some. I did not try 11mm (ID) X 17mm (OD) X 3mm (Diameter) Silicone because I could not find them in small quantities, but it is right between the two and may be just right. I also don’t know how well BUNA would work. It seems less stretchy to me and might make No. 3 too hard to get on the post and No. 5 too hard to get the connector on post. I’ll leave it someone else to try BUNA and 11mm (ID) X 17mm (OD) X 3mm (Diameter) Silicone.

I ordered small quantities on Amazon from here:
http://www.amazon.com/dp/B008MKXQ9M/..._M3T1_ST1_dp_1 (10 pcs. for $3.49 - 10mm (ID) X 16mm (OD) X 3mm (Diameter) Silicone)
http://www.amazon.com/dp/B008ASY3Y8/...M3T1_ST1_dp_i2 (10 pcs. for $3.47 - 12mm (ID) X 18mm (OD) X 3mm (Diameter) Silicone)
Larger quantities (and the 11x17x3 in silicone) can be purchased at http://www.oringsandmore.com/.

I welcome others to carry the torch from here and post their results. I’ve also attached a few photos.
No. 5 is on the left, a BUNA -111 (agreed ball lock size) in the middle, and No 3 on the right.

Has anyone tried the 11mm x 17mm x 3mm Buna for the pin lock posts?

 
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Old 05-13-2014, 05:45 AM   #122
barrooze
 
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Jan 2009
Pearland, TX
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Well, just found a leak in my gas line from a slightly cocked gas QD with a poor-fitting o-ring. Is the general consensus for pin lock QDs to use the silicon 10mm x 16mm x 3mm o-ring? Has anyone tried the 11mm x 17mm x 3mm?

Thanks!!
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Old 05-23-2014, 04:43 AM   #123
fifelee
 
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Dec 2006
Vaughn, MT
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Quote:
Originally Posted by barrooze View Post
Well, just found a leak in my gas line from a slightly cocked gas QD with a poor-fitting o-ring. Is the general consensus for pin lock QDs to use the silicon 10mm x 16mm x 3mm o-ring? Has anyone tried the 11mm x 17mm x 3mm?

Thanks!!
I see no need to go bigger then 10mm x 16mm x 3mm. It is plenty tight. Silicone is great or save some money and use Buna

 
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Old 09-24-2014, 04:21 PM   #124
Mark_tries_brewing
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Feb 2014
, Virginia
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I just wanted to add that I have found lid o-rings that seem to seal reliably with or w/o pressure. http://www.mcmaster.com/#90025k551/=tv3mi3

I highly recommend them to anyone especially since I have had problems with some lids leaking when I drop the pressure to fill bottles form a keg. Please add these O-rings to the original post.

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Old 10-01-2014, 10:52 AM   #125
KindofBlues71
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Dec 2011
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I removed and cleaned all the o-rings on my 2.5 gal ball lock keg and subsequently lost one of the universal poppet o-rings. I did some searching and found them for sale at Brooklyn Homebrew. There have been a few requests for the universal poppet o-ring size so here's the info according to Brooklyn Homebrew:

Universal Poppet O-ring
4mm ID x 6mm OD x 2mm Thickness, -35° to 250° F Temp Range

I'm not affiliated w/ Brooklyn Homebrew, just passing the info along. I did not order from them as I needed the o-ring ASAP and wound up buying a replacement poppet valve w/ o-ring from my LHBS.

 
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Old 01-19-2015, 07:34 PM   #126
mr_rogers
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Dec 2012
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So I pulled the trigger on a silicone oring order from mcmaster carr. I plan to replace all of my orings with silicone because the Buna-n ones seem to stretch and degrade pretty quickly. anyone have any idea what kind of lube is best on the silicone orings? I know i shouldn't use silicone but would my normal Keg lube work on silicone?

 
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Old 01-20-2015, 01:03 AM   #127
brettwasbtd
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Apr 2010
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I use the normal keg lube without any adverse effects... Maybe I have used then long enough though? I only use them for the posts, not the dip tubes though

 
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Old 01-20-2015, 02:10 AM   #128
mr_rogers
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Dec 2012
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I'm pretty certain you should see the effect pretty quick. Doesn't it dissolve silicone?

 
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Old 01-20-2015, 10:32 AM   #129
milldoggy
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Mar 2008
Pottstown, Pa
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I use silicon grease on my silicone orings, been two years, no ill effect.
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Old 01-20-2015, 10:41 AM   #130
milldoggy
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Mar 2008
Pottstown, Pa
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I just checked what i use, it is petrol-gel, got it on amazon. Does not say silicon, maybe it is not. It is white grease.
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